/**
 * #      891
 * 名称   子序列宽度之和
 * 链接   https://leetcode-cn.com/problems/sum-of-subsequence-widths
 * 题解   [30](https://leetcode-cn.com/problems/sum-of-subsequence-widths/solution)
 * 通过率 31.8%
 * 难道   困难
 */

